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Network Troubleshooting
Evidence Checklist
Seven checks for a more defensible investigation: scope, measurement, alternatives, escalation and verification.
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Network Troubleshooting
ACTUAL TOOLKIT SAMPLE
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The sample ZIP includes an editable investigation record and the complete synthetic circuit-down case, with explicit sharing permission.
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80 missing hop replies.
12 destination timeouts.
What do you escalate?
A five-minute test sends 200 probes from one affected source. Another source is unaffected. The local egress queue also records drops during that window.
What the record supports
The selected round-trip probe has 12 timeouts out of 200. Queue drops correlate with the window. Neither observation alone identifies the exclusive cause or the direction of loss.
A useful next request
Ask the responsible owner for matched application timing, queue measurements and direction-specific evidence during a comparable busy window. Preserve method, count and timezone. Do not request a repair to an unproven faulty intermediate hop.